Cita APA (7a ed.)

Keppel, R. D. (1989). Serial murder: Future implications for police investigations. Anderson.

Cita Chicago Style (17a ed.)

Keppel, Robert D. Serial Murder: Future Implications for Police Investigations. Cincinatti, Ohio: Anderson, 1989.

Cita MLA (8a ed.)

Keppel, Robert D. Serial Murder: Future Implications for Police Investigations. Anderson, 1989.